Partial fix for loading projects with missing layers from Sunilraj at KCube. see #3468

git-svn-id: http://svn.osgeo.org/qgis/trunk/qgis@15332 c8812cc2-4d05-0410-92ff-de0c093fc19c

Author: timlinux

src/app/legend/qgslegend.cpp

@@ -33,6 +33,7 @@
 #include "qgsproject.h"
 #include "qgsrasterlayer.h"
 #include "qgsvectorlayer.h"
+#include "qgsprojectbadlayerguihandler.h"
 
 #include <QFont>
 #include <QDomDocument>
@@ -999,9 +1000,19 @@ bool QgsLegend::readXML( QgsLegendGroup *parent, const QDomNode &node )
       bool isOpen;
       QgsLegendLayer* currentLayer = readLayerFromXML( childelem, isOpen );
 
+      bool ignorePressed = QgsProjectBadLayerGuiHandler::mIgnore;
+      
       if ( !currentLayer )
-        return false;
-
+      {  
+        if( ignorePressed == true )
+        {
+          continue;
+        }
+        else
+        {
+          return false;
+        }
+      }
       // add to tree - either as a top-level node or a child of a group
       if ( parent )
       {

src/gui/qgsprojectbadlayerguihandler.cpp

@@ -4,6 +4,7 @@
 #include <QDomDocument>
 #include <QFileInfo>
 #include <QMessageBox>
+#include <QtGui/QPushButton> 
 
 #include "qgslogger.h"
 #include "qgisgui.h"
@@ -13,27 +14,50 @@ QgsProjectBadLayerGuiHandler::QgsProjectBadLayerGuiHandler()
 {
 }
 
+bool QgsProjectBadLayerGuiHandler::mIgnore = false;
+
 void QgsProjectBadLayerGuiHandler::handleBadLayers( QList<QDomNode> layers, QDomDocument projectDom )
 {
   QgsDebugMsg( QString( "%1 bad layers found" ).arg( layers.size() ) );
 
   // make sure we have arrow cursor (and not a wait cursor)
   QApplication::setOverrideCursor( Qt::ArrowCursor );
-
-  if ( QMessageBox::Ok == QMessageBox::critical( NULL,
-       tr( "QGIS Project Read Error" ),
-       tr( "Unable to open one or more project layers\nTry to find missing layers?" ),
-       QMessageBox::Ok | QMessageBox::Cancel ) )
+  
+  QMessageBox messageBox;
+      
+  QAbstractButton *ignoreButton = 
+     messageBox.addButton(tr("Ignore"),QMessageBox::ActionRole);  
+    
+  QAbstractButton *okButton = messageBox.addButton( QMessageBox :: Ok );
+  
+  messageBox.addButton( QMessageBox :: Cancel );
+    
+  messageBox.setWindowTitle(tr("QGIS Project Read Error"));
+  messageBox.setText(tr("Unable to open one or more project layers\nTry to find missing layers?"));
+  messageBox.setIcon(QMessageBox::Critical);
+  messageBox.exec();
+  
+  QgsProjectBadLayerGuiHandler::mIgnore = false;
+  
+  if(messageBox.clickedButton() == okButton)
   {
     QgsDebugMsg( "want to find missing layers is true" );
-
+      
     // attempt to find the new locations for missing layers
     // XXX vector file hard-coded -- but what if it's raster?
 
     QString filter = QgsProviderRegistry::instance()->fileVectorFilters();
     findLayers( filter, layers );
-  }
-
+  }       
+  else if (messageBox.clickedButton() == ignoreButton)
+  {
+    QgsProjectBadLayerGuiHandler::mIgnore = true;   
+  } 
+  else
+  {
+    // Do nothing
+  }  
+ 
   QApplication::restoreOverrideCursor();
 }
 

src/gui/qgsprojectbadlayerguihandler.h

@@ -19,6 +19,9 @@ class GUI_EXPORT QgsProjectBadLayerGuiHandler : public QObject, public QgsProjec
 
     /** implementation of the handler */
     virtual void handleBadLayers( QList<QDomNode> layers, QDomDocument projectDom );
+    
+    /** Flag to store the Ignore button press of MessageBox used by QgsLegend */
+    static bool mIgnore;
 
   protected: